| 초록 |
In this study, we suggest that a solvent vapor annealing process, which forms self-assembled gyroid structures in polystyrene-b-poly(methyl methacrylate) (PS-b-PMMA) films, causes unique structural distortion due to directional deformation upon deswelling processes. Immediately upon solvent vapor annealing processes, rapid and spontaneous deswelling of the swollen PS-b-PMMA films lead to triclinic gyroid structures with different z-directional contraction ratios, remaining lateral dimensions unchanged. Forbidden reflections identified in Grazing-incidence small angle X-ray scattering patterns and electron-density difference map analyses suggest that the non-affine distortion in gyroid structures occurs during the deswelling process. Furthermore, a level-set approach is developed to quantitate the structural characteristics of two PMMA channels in terms of inversion symmetry-breaking, which leads us to exploit its possible application to optical Weyl photonic crystals. |
